Add jest config

Author: druny

jest.config.js

@@ -0,0 +1,11 @@
+module.exports = {
+  preset: "jest-preset-typescript",
+  moduleFileExtensions: ["ts", "js"],
+  transform: {
+    "^.+\\.(js)$": "<rootDir>/node_modules/babel-jest",
+    "\\.(ts)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
+  },
+  testRegex: "(/__tests__/.*|\\.(test|spec))\\.(ts|tsx|js)$",
+  testPathIgnorePatterns: ["\\.snap$", "<rootDir>/node_modules/"],
+  cacheDirectory: ".jest/cache"
+};